Version 2.3.3
The PHP Validation script is a set of validation rules which lets you add server-side validation to your forms quickly and with as little effort as possible. I wrote it to work as the server-side version of my RSV validation library; both employ exactly the same logic and validation rules, so you can simply copy and paste the validation rules from one to the other - which really cuts down on dev time.
See the documentation for more info: http://www.benjaminkeen.com/software/php_validation/
For the javascript version, see the RSV library here: https://github.com/benkeen/rsv/